TRIBE CONCHACEA. 105 
~C. Vutnerata. Brod. Z. P. 1835. Sub-globular, with very 
numerous smooth concentric lines, whitish, with here and there 
purple-red narrow bands ; lunwe and anterior area blackish-purple, 
ventral margin red, sub crenulated within ; epidermis brownish ; 
inside white suffused with pink. 12..13.—C. America. 
C. Pannosa. Sow. Z. P. 1835. Obovate, thickish, smooth, 
whitish, obscurely painted with lurid spots, streaks, or angular 
lines : apices rather prominent. 5%, . . 13,.-- Chili. 
C. Unicotor. Sow. Z. P. 1835. Ovate, sub-cordiform, 
thickish, brownish, smooth and polished, but the sides concentri- 
cally grooved; anterior side the longer, sub-acuminated towards 
the ventral edge, which is smooth ; purplish within.— Variety. 
Larger and whitish. 1-3, .. 148;.—C. America. 
C. Argentina. Sow. Z P. 1835. Sub triangular, white, 
smooth, sub-equilateral, posterior side rather shorter, anterior sub- 
acuminated ; anterior dorsal edge straightish, sloping; ventral 
margin rounded: epidermis thin, silvery-white, horny, velvety 
without. 2,1,..23.—C. America. 
C Convexa. Say. Journ, A. N.S. Phil. 4. t=. 12. f. 3.— 
Gould. Mas. p. 84. f. 49.—List. t. 273. f. 109.2? Oval, sub- 
cordate, inequilateral, thinnish, chalky-white, very convex, rounded 
at the sides, marked with coarse lines of growth: ligament long 
aud somewhat sunken: beaks prominent and recurved; lunule 
distinct, cordate: inside polished, milk-white. 13..13.— NV. 
America. 
C. Prora. Conr. Journ. A. N.S. Phil. 7. p. 253. t. 19. f. 
18. Inflated, polished, white, ovate-subcordate ; posterior side 
short, sub-cuneiform, and sharply angulated at the extremity, which 
is much elevated, its dorsal edge straight or slightly concave - 
ventral edge well rounded ; lunule very slightly impressed, bounded 
by a broad indistinct carina. 13. — Pacific. 
C. Froriperyta.—Cuione F. Grayin Analyst. 1838. Ovate- 
sub-cuneiform, depressed, much produced and attenuated anteriorly, 
the ligamental edge sloping in almost a straight line to the anterior 
extremity : posteriorly short and rounded; ventral edge arcuated : 
smooth (except on the anterior slope, which is concentrically 
grooved,) polished, buff or drab, with more or less numerous and 
distinct lighter rays interrupted by dark angulated or dotted 
markings : lunule lanceolate ; inside orange, margin entire ; anterior 
tooth rudimentary. ?..13.—WSenegal. 
C Pranuxata. Brod. and Son. Z. J. 5. p. 48.—Beechey. 
Zool, t. 43. f. 6.—Reeve. t. 69. f. 2.—Sow. G. f. 2. Triangular, 
rather depressed, sub-equilateral, the base and lower augles rounded, 
pale yellowish, with many diverging fuscous rays: inside white 
varied with brownish violet, anterior tooth so remote as almost to 
appear a lateral one.— Variety. More equilateral, rather more 
